package com.max.jacentsao.banjia.utils;

import android.view.View;
import android.view.ViewGroup;
import android.widget.ListAdapter;
import android.widget.ListView;

/**
 * Created by JacenTsao on 2016/1/16.
 * 此工具类用于给ListView计算高度
 */
public class ListViewHeightCalculateUtil {
    public static void setListViewHeightBasedOnChildren(ListView listView) {
        //获取ListView对应的Adapter
        ListAdapter listAdapter = listView.getAdapter();
        if (listAdapter == null) {
            // pre-condition
            return;
        }

        int totalHeight = 0;
        for (int i = 0, len = listAdapter.getCount(); i < len; i++) { //listAdapter.getCount()返回数据项的数目
            View listItem = listAdapter.getView(i, null, listView);
            listItem.measure(0, 0); //计算子项View 的宽高
            totalHeight += listItem.getMeasuredHeight(); //统计所有子项的总高度
        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        listView.getDividerHeight(); //获取子项间分隔符占用的高度
        //params.height最后得到整个ListView完整显示需要的高度
        listView.setLayoutParams(params);
    }

   /* public void setHeight() {
        int adaptCount = homeProductListAdapter.getCount();
        for (int i = 0; i < adaptCount; i++) {
            View temp = homeProductListAdapter.getView(i, null, lvHomePoductList);
            temp.measure(0, 0);
            listViewHeight += temp.getMeasuredHeight();
        }
        ViewGroup.LayoutParams layoutParams = this.lvHomePoductList.getLayoutParams();
        layoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT;
        layoutParams.height = listViewHeight;
        lvHomePoductList.setLayoutParams(layoutParams);
    }*/
}

